From Fedora Project Wiki
PDC has been retired as of late July / early Aug 2024.
The application hasn't been maintained upstream in a long while and was running on RHEL7/python2.
Things that were using pdc have moved to querying bodhi or src.fedoraproject.org or other places.
If you were using pdc and need to replace the functionality, please contact the infrastructure team and we will try and point you in the right direction.